After the full test of my own PCB prototype, some little modifications are needed.

The 2 capacitors of the low-pass filter formed by U12:A are inverted.
C2 must have 200pF value and C3+C4 value must have 100pF total value.
So, unsolder the capacitor C4(or C3), resolder it in parallel with C2 (100pF).

The two FET transistors (T4,T5) are mounted upside down.
For working properly, you can connect the pin 2 to pin 1 together, then you rotate it from 180° of the silkscreen legend.

R78 and R21 have wrong values, you must replace them
with 10kΩ instead of 100kΩ.